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dc.contributor.authorTatham, Richard
dc.contributor.authorKorolkova, Natalia
dc.date.accessioned2014-09-17T09:01:08Z
dc.date.available2014-09-17T09:01:08Z
dc.date.issued2014-01-09
dc.identifier149091233
dc.identifierb88bc69e-eca0-4664-bc08-3c3e41484e0f
dc.identifier000332169700002
dc.identifier84892496300
dc.identifier000332169700002
dc.identifier.citationTatham , R & Korolkova , N 2014 , ' Entanglement concentration with quantum nondemolition Hamiltonians ' , Physical Review. A, Atomic, molecular, and optical physics , vol. 89 , no. 1 , 012308 . https://doi.org/10.1103/PhysRevA.89.012308en
dc.identifier.issn1050-2947
dc.identifier.otherORCID: /0000-0003-4830-9667/work/59302821
dc.identifier.urihttps://hdl.handle.net/10023/5428
dc.descriptionWe also acknowledge an EU grant under the FET-Open project COMPAS (No. 212008) and are grateful for the support of the Scottish Universities Physics Alliance (SUPA).en
dc.description.abstractWe devise and examine two procrustean entanglement concentration schemes using quantum nondemolition (QND) interaction Hamiltonians in the continuous variable regime, applicable for light, for atomic ensembles or in a hybrid setting. We thus expand the standard entanglement distillation toolbox for use of a much more general, versatile, and experimentally feasible interaction class. The first protocol uses Gaussian ancillary modes and a non-Gaussian postmeasurement, the second a non-Gaussian ancillary mode and a Gaussian postmeasurement. We explicitly calculate the density matrix elements of the non-Gaussian mixed states resulting from these protocols using an elegant Wigner-function-based method in a numerically efficient manner. We then quantify the entanglement increase calculating the logarithmic negativity of the output state and discuss and compare the performance of the protocols.
dc.format.extent9
dc.format.extent815204
dc.language.isoeng
dc.relation.ispartofPhysical Review. A, Atomic, molecular, and optical physicsen
dc.subjectGaussian-Wigner functionen
dc.subjectDistillationen
dc.subjectLighten
dc.subjectQC Physicsen
dc.subject.lccQCen
dc.titleEntanglement concentration with quantum nondemolition Hamiltoniansen
dc.typeJournal articleen
dc.contributor.sponsorEuropean Commissionen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.identifier.doi10.1103/PhysRevA.89.012308
dc.description.statusPeer revieweden
dc.identifier.grantnumber212008en


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